diff --git a/benches/benchmarks.rs b/benches/benchmarks.rs
index a5d4eeb..1a016d7 100644
--- a/benches/benchmarks.rs
+++ b/benches/benchmarks.rs
@@ -77,43 +77,57 @@ impl Spindex2d {
         index
     }
 
+    /// This method assumes that the points have the same cardinality and order as the points used
+    /// when constructing this index. May panic if the updated points argument is longer than the
+    /// original points.
+    pub fn update(&self, points: &[Point2d]) {
+        todo!()
+    }
+
     fn sort(&self) {
         let xs = self.xs.clone();
-        let ys = self.ys.clone();
-        let xpoints = self.points.clone();
-        let ypoints = self.points.clone();
-
         let xhandle = thread::spawn(move || {
-            {
-                let mut xs = xs.write().unwrap();
-                xs.sort_unstable_by(|a, b| {
-                    let a = a.read().unwrap();
-                    let b = b.read().unwrap();
-                    a.cmp(&b)
-                });
-            }
+            let mut xs = xs.write().unwrap();
+            xs.sort_unstable_by(|a, b| {
+                let a = a.read().unwrap();
+                let b = b.read().unwrap();
+                a.cmp(&b)
+            });
+        });
+
+        let ys = self.ys.clone();
+        let yhandle = thread::spawn(move || {
+            let mut ys = ys.write().unwrap();
+            ys.sort_unstable_by(|a, b| {
+                let a = a.read().unwrap();
+                let b = b.read().unwrap();
+                a.cmp(&b)
+            });
+        });
+
+        xhandle.join().unwrap();
+        yhandle.join().unwrap();
+
+        let xs = self.xs.clone();
+        let points = self.points.clone();
+        let xhandle = thread::spawn(move || {
             let xs = xs.read().unwrap();
             for (i, x) in xs.iter().enumerate() {
                 let x = x.read().unwrap();
                 let p = x.point;
-                xpoints[p].write().unwrap().x = i;
+                points[p].write().unwrap().x = i;
             }
         });
 
+        let ys = self.ys.clone();
+        let points = self.points.clone();
         let yhandle = thread::spawn(move || {
-            {
-                let mut ys = ys.write().unwrap();
-                ys.sort_unstable_by(|a, b| {
-                    let a = a.read().unwrap();
-                    let b = b.read().unwrap();
-                    a.cmp(&b)
-                });
-            }
             let ys = ys.read().unwrap();
+
             for (i, y) in ys.iter().enumerate() {
                 let y = y.read().unwrap();
                 let p = y.point;
-                ypoints[p].write().unwrap().y = i;
+                points[p].write().unwrap().y = i;
             }
         });
 
@@ -139,7 +153,7 @@ const SEED_1: &[u8; 32] = b"Gv0aHMtHkBGsUXNspGU9fLRuCWkZWHZx";
 const DEFAULT_NUM_POINTS: usize = 1_000_000;
 
 fn new_index(c: &mut Criterion) {
-    c.bench_function("bulk load baseline", move |b| {
+    c.bench_function("new index", move |b| {
         let points: Vec<_> = create_random_points(DEFAULT_NUM_POINTS, SEED_1)
             .into_iter()
             .map(|[x, y]| Point2d { x, y })
@@ -151,6 +165,30 @@ fn new_index(c: &mut Criterion) {
     });
 }
 
+fn update_positions(c: &mut Criterion) {
+    c.bench_function("update positions", move |b| {
+        let points: Vec<_> = create_random_points(DEFAULT_NUM_POINTS, SEED_1)
+            .into_iter()
+            .map(|[x, y]| Point2d { x, y })
+            .collect();
+
+        let mut rng = Hc128Rng::from_seed(*SEED_1);
+
+        let jitters: Vec<_> = points
+            .iter()
+            .map(|p| {
+                let x = p.x + rng.random_range(-5.0..=5.0);
+                let y = p.y + rng.random_range(-5.0..=5.0);
+                Point2d { x, y }
+            })
+            .collect();
+
+        let index = Spindex2d::new(&points);
+        let mut round = 0;
+        b.iter(|| todo!());
+    });
+}
+
 //fn reuse_index(_c: &mut Criterion) {}
 
 criterion_group!(benches, new_index);